S-93C46A Datasheet, PDF (51/53 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

Collection of Product FAQs
Author: Kano Tomoo
Date: 98/11/12 (Thursday) 10:17 (modified: 99/01/13(Wednesday))
<Information level>
A:
Public (Printing O.K.)
Index:
D: Technical terms
<Product>
Division name: 01 IC
Category 1: 12 Memory
Category 2:
Cal No.:
2. Serial EEPROM
Overall
Related documents:
Question:
What about the basic terms. (continuous read, sequential read)?
Answer:
- Continuous read, sequential read
→S-93C series, S-29 series, S-24C series
Function by which data is read from a specified address using a read command, followed by the
output of the next address. This is useful when there is a large amount of user data (ex.: ID codes).
Continuos read
CS
SK
1 2 3 4 5 6 7 8 9 10 11 12
23 24 25 26 27 28
39 40 41 42 43 44
DI
DO
11
0
A₅ A₄
A₃
A₂
A₁
A₀
Hi-Z
0
D
15
DD
14
13
D₂
D₁
D₀ D₁₅ D₁₄
D₁₃
D₂
D₁
D₀ D₁₅ D₁₄
D₁₃
Hi-Z
- Serial-port direct coupling, microcomputer interface, 8-bit command
→S-29x9xA, S-29x55A, S-2900A
The serial port is a serial I/O port provided for a microcomputer. A device that can be easily and
directly coupled to this port is referred to as a “serial-port direct-coupling type” or a “microcomputer
interface.”
1. The EEPROM is configured as follows for simple direct coupling:

Data is input at the rising edge of the SK input clock, and output at its falling edge.
 Commands and data are input and output in 8 bits.
2. A microcomputer with a serial port communicates in 8 bits (8 clocks).
This configuration can substantially reduce the number of programs required for the microcomputer.
The advantages are easy programming and a reduced ROM capacity.
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